Card Pact's Foes Arm for Battle

By

Robin Sidel

Updated July 15, 2012 10:22 p.m. ET

A trade association representing some 3,700 convenience stores and other companies has hired a longtime legal foe of Visa Inc. and MasterCard Inc. to help challenge last week's $6.6 billion lawsuit settlement between the credit-card industry and merchants.

The National Association of Convenience Stores says the pact, announced on Friday, doesn't address the core issue of how much control Visa, MasterCard and card-issuing banks have over the merchants who accept their cards for purchases. The Alexandria, Va.-based group...